RWE and TotalEnergies have signed an agreement with ARC Marine for the supply of 66 Reef Cubes at part of the future OranjeWind offshore wind farm in the Dutch North Sea. Installation of the foundations will begin in 2026, and once construction is complete the 66 Reef Cubes will be placed at 11 turbine foundations. In total, the deployment will create 1,440 square metres of surface habitat.
Each Reef Cube weighs almost 6,000 kilograms, stands 1.5 metres high and is made from low-carbon recycled materials certified as safe for marine use. Shell material will be incorporated to support native oyster settlement and longer-term habitat formation. The cuboid design is intended to provide stability, efficient transport and straightforward deployment. The structures will remain for the full operational life of OranjeWind.
The Reef Cubes contain cavities and surface texture expected to support marine flora and fauna. Previous research by ARC Marine in the North Sea showed a wide range of species living on and around the structures during trials, and similar outcomes are anticipated at OranjeWind. Cod and native oysters have been identified as focal species due to their wider ecological value. By providing suitable habitat and shelter, the project is expected to support a broader community of marine life.
OranjeWind is a joint venture between RWE and TotalEnergies. The 795 MW offshore wind farm will be located 53 kilometres off the Dutch coast. Offshore construction is expected to begin in 2026, with full operation planned for early 2028.
image credit: ARC marine
